In the "Debugging example", the first prompt doesn't include the code but the second does? No wonder it can find the bug! I guess you may prompt as you like, as

In the "Debugging example", the first prompt doesn't include the code but the second does? No wonder it can find the bug! I guess you may prompt as you like, as long as you provide the actual code, it usually finds bugs like this. About the roles: Can you measure a difference in code quality between the "expert" and the "junior"?